Related Clues:
- One who is not very bright
- Extinct, flightless bird
- Extinct ''Wonderland'' bird
- Another dunderhead
- Pigeon's erstwhile kin
- Bygone Mauritian bird
- Wonderland creature
- Mental halfwit
- Thickhead
- Long-extinct bird
- Extinct bird of Mauritius
- One isn't sharp
- Bye-bye birdie?
- It became extinct less than 100 years after its discovery
- Unlikely Mensa candidate